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Turbulent transport of radiation in the solar convective zone
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Ben-Gurion University of Negev, Israel.ORCID iD: 0000-0001-7308-4768
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Ben-Gurion University of Negev, Israel.
Number of Authors: 22021 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 508, no 1, p. 1296-1304Article in journal (Refereed) Published
Abstract [en]

A turbulent transport of radiation in the solar convective zone is investigated. The mean-field equation for the irradiation intensity is derived. It is shown that due to the turbulent effects, the effective penetration length of radiation can be increased several times in comparison with the mean penetration length of radiation (defined as an inverse mean absorption coefficient). Using the model of the solar convective zone based on mixing length theory, where the mean penetration length of radiation is usually much smaller than the turbulent correlation length, it is demonstrated that the ratio of the effective penetration length to the mean penetration length of radiation increases 2.5 times in the vicinity of the solar surface. The main reasons for this are the compressibility effects that become important in the vicinity of the solar surface where temperature and density fluctuations increase towards the solar surface, enhancing fluctuations of the radiation absorption coefficient and increasing the effective penetration length of radiation.

Place, publisher, year, edition, pages
2021. Vol. 508, no 1, p. 1296-1304
Keywords [en]
radiative transfer, turbulence, Sun: interior
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-202018DOI: 10.1093/mnras/stab2595ISI: 000741285400054OAI: oai:DiVA.org:su-202018DiVA, id: diva2:1637136
Available from: 2022-02-11 Created: 2022-02-11 Last updated: 2022-02-11Bibliographically approved

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Rogachevskii, Igor

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